Arc-lamp.



W. R. RIDINGS.

ARC LAMP.

APPLIOATION FILED 001'. 5, 1912.

Patented Feb. 4, 1913.

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UNITED STATES PATENT ormon WILLIAM REGINALD RIDINGS, or MANCHESTER, ENGLAND.

ABC-LAMP.

Specification of Letters Patent.

Patented Feb. 4. 1913.

Application filed October 5, 1912. Serial No. 724,163.

To all whom it may concern:

Be it known that I, WILLIAM REGINALD RIDINcs, sub'ect of the King of Great Britain, and resi ing at Manchester, in the county of Lancaster, England, have invented certain new and useful Improvements in Are- Lamps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to improvements in arc lampsof the magazine type and in particular to lamps of this type in which the carbons are inclined toward each other, and both point in a downward direction, the arc being formed at their lower extremities. In this type of arc lamp it has been proposed to feed the electrodes simultaneously forward by a device attached to a carrier which is alternately raised and lowered by an endless sprocket chain'so that the said device is causedto engage successively with each The said tappets were however liable to slip ofi the end of the carbons if the latter were subjected to unusual frictional resistance from any cause.

simplify and improve the feeding mechanism of this type of lamp, and at the same time obviate the above named defect. I at? tain these'objects bythe mechanism illustrated in the accompanying drawing, in

which- Figure 1 is a front view, Fig. 2 a side view; and Fig. 3 a sectional plan on line A.-A of Fig. 1,- Fig.5; is adetached sectional front view and Fig; 5 a detached side view of one embodiment of my invention.

Similar letters refer to similar parts throughout the several 'views' In carrying out my invention and referring to the figures generally each magazine is formed of a flat rectangular receptacle 0: open at opposite sides. One of the said open carbons as hitherto. A plate 6, facing the other side, but at a distance approximately equal to the thickness of a carbon, away from the same, is secured to the top and'bottom of the receptacle, by means of brackets which project at right angles from thesame in a direction parallel to the plate 7). A slot a? which is open equally" at the upper and lower end of the receptacle is thus formed.

A. pitch chain 6 is so mounted on two pitch wheelsf and 9 that one side comes between the receptacles and in alinement with the slots d. The axis of the upper pitch wheel f is situated above the upper ends of the said receptacles and the axis of the lower pitch wheel '9 slightly below the lower -ends of the same. To each of two pivots of the chain at equal distances from each other is secured a pin it which projects through the slots at. The upper pitch wheel f is driven by a worm gear 2', k which may receive its motion from a ratchet and pawl operated by a shunt coil or-from a small motor (not shown). The carbon holders Z at the base of the lamp are in alinement with the slots "d. A bar 17. is secured to a shaft 0 which has also secured to it an arm 7) under the influence of a spring 1 The bar n serves to force carbons toward the said slots.

The above described mechanism operates as follows :'VVhen the magazines a are charged the foremost carbons 1' are forced into the slots d and pressed against the plates 6. Oncurrent being appliedto the lamp, the'said shunt coil or motor is actuatedand the chaine thereby moved, one T he-obje'ct of my invention is to dispense with the said deviceand carrier and thereby of thepins k on the same traveling down ward in the slots 03 and the other pin k upward on the other side of the chain 6. The pin it in the said slots presses the carbons a downward through the spring clutches m, and when the carbons r are fed sufiiciently the arc is struck and the lamp 'continuesto burn in the usual manner. The

carbons 1- are fed downward when. required by the pin It in the slots (Z. By the time the carbons 1" have been forced to the lower endsof the slots (1 by the pin it the latter has reached the end of its straight downward travel and commences to move around been passing over the periphery: of the upper pitch wheel f, enters the open slots (1 at the top and proceeds to press the carbons s downward, until the ends of the now used carbons r are forced out and a new are has been formed with the new carbons s.

As will be readily understood the above described mechanism may be applied to are laomps havmg one or both magazines mov a le.

The faces of the plates 1) against which the carbons 8 press may have slight grooves t to guide the said carbons and the plates 6 may also be rounded off at their-lower ends' to facilitate the exit of the pins h from the slots d.

I claim:

1. In an arc lamp, converging grooved guides, magazines adjacent to and in parallelism with the guides and adjacent the grooved side of such guides, a sprocket chain 'moving intermediate the guides and having one, side in a plane with the interval between the guides and themagazine and rods carried by the chain extending laterally therefrom proportioned to extend at all times between the guides and magazines.

2. In an arc lamp, convergin grooved guides having their lower ends ared outwardly, a base connected with the lower outwardly extending ends of the guides, magazines spaced from the guides, each in a plane with one of the guides and adjacent the grooved side of such guide, a sprocket chain moving substantially midway between .the guides and having one side" in a plane with the interval between the magazines and the guides, a rod carried by and extending laterally from the chain and proportioned to extend at all times between the guides and magazines and to pass between the outwardly flared ends of the guides, and means to move carbons within I the magazines.

Intestimony whereof I have aifixed my signature in presence of two witnesses.

WILLIAM REGINALD RIDINGS- Witnesses:

' F. BOSSHARDT,

STANLEY E. BRAMALL. 

